No abstract

the same two stages really exist, but that iron catalyzes the secondary reaction so that it is practically instantaneous. Reactions.It has long been known that perchloro-mercaptan can be reduced by silver dust,1 iron and acetic acid,2 or stannous chloride, or tin and hydrochloric acid3 to thiophosgene, according to the reaction CSCI4 + SnCl2 -CSC12 + SnCl4. When this reduction was tried with zinc and hydrochloric acid the perchloro-methyl-mercaptan disappeared completely; apparently it was reduced to methane, which escaped as gas. With iron and hydrochloric acid, a mixture of thiophosgene and carbon tetrachloride is obtained. When perchloro-methyl-mercaptan was refluxed with iron filings it gave nothing but carbon tetrachloride. An attempt to replace one of the chlorine atoms by fluorine failed. When perchloro-methylmercaptan was refluxed with zinc fluoride the inner tube of the condenser was rapidly and deeply etched, and the product was nearly pure carbon tetrachloride.Summary. A convenient method of preparing perchloro-methyl-mercaptan with Yields as high as 65% has been worked out, and some of the reactions of this compound have been studied. Baltimore, Md.